I ventured over there after work last night, and treated myself to a single scoop of vanilla custard with crumbled Andes mints on top. I don't recall ever having frozen custard before, but nevertheless, it was still delicious. You have your choice of vanilla, chocolate, and lemon flavors, and you can add toppings--Oreos, Andes mints, Reese's Peanut Buttercups, M&Ms, et al.--as you like. The downside is that it is incredibly pricey. I paid $4 and change just for my single scoop with topping...in a cup, no less.
They do have a wide variety of pre-built sundaes from which to choose, with names such as "The Principal's Office"*, "The Locker Room (nuts, nuts and more nuts!)"**, and "The Recess"***. If you're near Pike and 13th, you should stop by and indulge yourself.
*5 scoops of fresh frozen custard, 3 mix-ins of your choice, a homemade fudge brownie, banana halves, sliced almonds, whipped cream and a cherry on top--if it will fit!
**3 scoops of fresh vanilla custard, with each scoop divided by a different type of nut, topped with hot fudge, whipped cream and a cherry.
***3 scoops of fresh vanilla custard layered with Reese's cup pieces, warm caramel, more Reese's, hot fudge, whipped cream and a cherry. Get it? Reese's, Recess...Come on!